J Am Geriatr Soc
William James Deardorff
- Medicare services, 2024
- 219
- Medicare patients, 2024
- 133
- Part D claims, 2024
- 893
- Publications
- 19
- MIPS score, 2024
- 100
- Practice address
- 505 Parnassus Ave, Box 0296, San Francisco, CA 94143
- Practice phone
- Call (415) 353-2733
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find William Deardorff's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
William James Deardorff is a geriatric medicine (internal medicine) physician in San Francisco, California
William Deardorff practices at UCSF Helen Diller Medical Center at Parnassus Heights in San Francisco, California, part of University of California Health.
William Deardorff's NPI, 1003348830, was assigned on March 30, 2017. William Deardorff graduated from Saint Louis University School Of Medicine in 2017. William Deardorff holds California license A169642.
- NPI
- 1003348830NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6800209917
- NPI enumeration date
- March 30, 2017
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (415) 353-2733
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 35
- Medical school graduation
- 2017
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
William James Deardorff practices at UCSF Helen Diller Medical Center at Parnassus Heights in San Francisco, California
William Deardorff's primary practice is UCSF Helen Diller Medical Center at Parnassus Heights, at 505 Parnassus Ave, Box 0296, San Francisco, CA 94143 in San Francisco County. The practice phone is (415) 353-2733.
- UCSF Helen Diller Medical Center at Parnassus Heights505 Parnassus Ave, Box 0296, San Francisco, CA 94143 · San Francisco CountyPhone(415) 353-2733
Source: Dmand AI Affiliation Data
William James Deardorff is affiliated with 2 sites of care and 3 medical groups
William Deardorff's primary practice is UCSF Helen Diller Medical Center at Parnassus Heights in San Francisco, California, part of University of California Health. The medical group on file is UCSF Pediatrics. Dmand AI also links William Deardorff to 2 more medical groups and 1 skilled nursing facility, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at William James Deardorff's practice
Dmand AI tracks the electronic health record (EHR) system at each site where William Deardorff practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| UCSF Helen Diller Medical Center at Parnassus Heights | Available with a free account |
| +1 more site and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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William James Deardorff is one of 497 geriatric medicine (internal medicine) physicians in California
Geriatric medicine is William Deardorff's primary specialty in the NPI Registry, under taxonomy code 207RG0300X. William Deardorff is board certified in geriatric medicine by the American Board of Family Medicine. Dmand AI has William Deardorff's licenses on file in 2 states: California and North Carolina.
Specialties and state licenses
- Geriatric medicine (internal medicine), CaliforniaPrimary
- North Carolina license
Clinical focus
Dmand AI lists acid reflux, anxiety, arthritis, chronic diabetes, chronic hypertension, chronic kidney disease, coronary artery disease and gout among the conditions William Deardorff treats.
Geriatric medicine (internal medicine) physicians near William Deardorff
Counts of geriatric medicine (internal medicine) physicians with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
William James Deardorff billed Medicare for 219 services in 2024
CMS data shows 219 Medicare services from William Deardorff across 6 procedure codes in 2024, for 133 Medicare patients. Medicare paid $25,925 for them. Every service was in a facility, such as a hospital, rather than an office.
William Deardorff's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 3312024: 18744%
- Other services
- 2023: 822024: 3261%
William Deardorff compared with the California median for geriatric medicine (internal medicine) physicians, 2024
- William Deardorff
- California median
- Medicare services
- 219vs 42448% below
- Medicare patients
- 133vs 17825% below
- Part D claims
- 712vs 93023% below
Medians across 466 geriatric medicine (internal medicine) physicians in California with Dmand AI profiles that report each measure.
William Deardorff's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for William Deardorff?
Medicare shows one payer. Book a meeting to get commercial claims data for William Deardorff and other geriatric medicine (internal medicine) physicians in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
William James Deardorff treated 133 Medicare patients in 2024, average age 78
CMS counts 133 Medicare patients who saw William Deardorff in 2024. The largest group is 75 to 84, with 47 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 45% are also on Medicaid. Their average risk score is 2.49, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts William Deardorff's median patient age at 79, with 57% women.
William Deardorff's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
William Deardorff's Medicare patients by sex, 2024
- Women8665%
- Men4735%
Chronic conditions among William Deardorff's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis73%
- Mood disorders55%
- Depression53%
- Diabetes47%
- Chronic kidney disease46%
- Heart failure41%
Share of Medicare patients with each condition. A patient can have several.
William Deardorff's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 79
Patient panel by sex, all payers
- Women57%
- Men35%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
William James Deardorff wrote 893 Medicare Part D claims in 2024
In 2024, William Deardorff wrote 893 Medicare Part D claims for 48 patients. 93% of them were for generic drugs. CMS names the drug for 712 of them, across 24 drugs with 11 or more claims each, at $19,399 in total drug cost. In 2023, CMS named 268 claims across 15 drugs.
William Deardorff's Part D claims by kind of drug, 2024
- Generic832 claims93%
- Brand-name61 claims7%
William Deardorff's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in William Deardorff's Part D claims, 2024
- Opioids2%14 of 893 claims
- Antibiotics1%13 of 893 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 2682024: 712166%
Drugs named by CMS: 24 in 2024, 15 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
William James Deardorff scored 100 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 100 out of 100 for William Deardorff for performance year 2024, reported as part of a group. William Deardorff accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
William Deardorff's MIPS scores, performance year 2024
- 100of 100Final score
- 95of 100Quality
- 40of 100Improvement Activities
- 81of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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William James Deardorff has 19 publications on record
Dmand AI links 19 papers to William Deardorff, published from 2014 to 2022. 2022 was the busiest year, with 3. The most frequent topics are Cognitive Dysfunction, Dementia and Hearing Loss. William Deardorff has published most often in J Am Geriatr Soc. William Deardorff's most frequent co-authors are Sei J. Lee, MD, George T. Grossberg, MD and Harish Dharmarajan, MD.
William Deardorff's papers by year, 2014 to 2022
Topics William Deardorff writes about most
- Cognitive Dysfunction
- Dementia
- Hearing Loss
- Independent Living
- Medicare
- Activities of Daily Living
- Alzheimer Disease
- Cholinesterase Inhibitors
William Deardorff's most frequent co-authors
- Sei J. Lee, MD6 shared papers
- George T. Grossberg, MD3 shared papers
- Harish Dharmarajan, MD2 shared papers
Recent publications by William Deardorff
J Am Geriatr Soc
J Am Geriatr Soc
J Am Geriatr Soc
See who William Deardorff researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who William Deardorff works with, so you can find a warm path to the right geriatric medicine (internal medicine) physicians.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
William James Deardorff received $99 in industry payments in 2022
CMS Open Payments shows 1 general payment to William Deardorff from 1 drug or device company in 2022. Food and beverage make up the largest share, 100% of the total. Eisai Inc. paid the most, $99.
Companies that paid William Deardorff the most, 2022 to 2022
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
William James Deardorff graduated from Saint Louis University School Of Medicine
William Deardorff graduated from Saint Louis University School Of Medicine in 2017.
- Medical school
- Board certified in geriatric medicine
- Board certified in geriatric medicine
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
William James Deardorff accepts plans from 6 insurance carriers
William Deardorff is in network with 6 carriers, including Blue Cross Blue Shield of Michigan, Blue Cross Blue Shield of Massachusetts and HCSC. Medicare plans come from the most carriers, 6. Check the plan with the practice before a visit.
- Blue Cross Blue Shield of Michigan
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Regence Health Plans
- CMS Medicare
- Molina
Plan types William Deardorff accepts, by number of carriers
- Medicare6
- PPO4
- HMO1
- POS1
Source: Dmand AI Insurance Network Data
Sources for William James Deardorff's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about William James Deardorff
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is William James Deardorff's NPI number?
William James Deardorff's NPI number is 1003348830. It was assigned on March 30, 2017, and it is active in the NPI Registry.
What does William James Deardorff specialize in?
William James Deardorff is a geriatric medicine (internal medicine) physician in San Francisco, California. The primary specialty in the NPI Registry is Geriatric Medicine (Internal Medicine) Physician (taxonomy code 207RG0300X).
Where does William James Deardorff practice?
William Deardorff practices at 505 Parnassus Ave, Box 0296, San Francisco, CA 94143. William Deardorff's primary practice is UCSF Helen Diller Medical Center at Parnassus Heights in San Francisco, California, part of University of California Health. Dmand AI also links William Deardorff to 2 medical groups and 1 skilled nursing facility.
What is William James Deardorff's office phone number?
The practice phone on file for William Deardorff is (415) 353-2733.
What is William James Deardorff's medical license number?
William Deardorff holds California license A169642, one of the licenses on file in 2 states.
Which states has William James Deardorff been licensed in?
Dmand AI has state licenses on file for William Deardorff in California (2020 to 2026) and North Carolina (2017 to 2020).
Which hospitals is William James Deardorff affiliated with?
William Deardorff practices at UCSF Helen Diller Medical Center at Parnassus Heights in San Francisco, California.
What medical group is William James Deardorff part of?
William Deardorff is linked to UCSF Pediatrics. Dmand AI links William Deardorff to 2 more medical groups.
Does William James Deardorff accept Medicare?
Yes. CMS data shows William Deardorff billed Medicare for 219 services in 2024, and William Deardorff accepts Medicare assignment.
What is William James Deardorff's MIPS score?
William Deardorff's MIPS final score for performance year 2024 is 100 out of 100, reported as part of a group.
Show 10 more questionsShow fewer questions
How many Medicare patients does William James Deardorff see?
CMS counts 133 Medicare patients who saw William Deardorff in 2024, with an average age of 78.
Is William James Deardorff board certified?
Yes. William Deardorff is board certified in geriatric medicine by the American Board of Family Medicine.
What services does William James Deardorff bill to Medicare?
In 2024, William Deardorff's most billed Medicare services were nursing facility care (99310), hospital inpatient care (99233) and medicare service (G0317).
Where did William James Deardorff go to medical school?
William Deardorff graduated from Saint Louis University School Of Medicine in 2017.
What drugs does William James Deardorff prescribe most?
In 2024 Medicare Part D data, William Deardorff's most prescribed drugs by claims were Omeprazole, Metformin HCl and Metformin HCl ER.
Has William James Deardorff received payments from drug or device companies?
CMS Open Payments shows $99 in general payments to William Deardorff from 1 company from 2022 to 2022. The largest total came from Eisai Inc.
How long has William James Deardorff been practicing?
William Deardorff graduated from medical school in 2017, 9 years ago.
Does William James Deardorff do research?
Dmand AI links 19 publications to William Deardorff, published from 2014 to 2022.
Who does William James Deardorff publish with?
William Deardorff's most frequent co-authors are Sei J. Lee, MD (6 shared papers), George T. Grossberg, MD (3 shared papers) and Harish Dharmarajan, MD (2 shared papers).
What insurance does William James Deardorff accept?
William Deardorff is in network with 6 carriers, including Blue Cross Blue Shield of Michigan, Blue Cross Blue Shield of Massachusetts and HCSC. Medicare plans come from the most carriers, 6. Check the plan with the practice before a visit.
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